/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2008-2011, Salzburg Research. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of the KiWi Project nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * Contributor(s):
 *  sschaffe
 *
 * File Info:
 *   User: sschaffe
 *   Date: 2011/02/15
 *   Time: 17:12
 *
 * Project: KiWi2, kiwi-core module
 */

package kiwi.core.services.importer;

import kiwi.core.api.importer.ImportService;
import kiwi.core.api.importer.Importer;
import kiwi.core.api.importer.KiWiImportException;
import kiwi.core.model.rdf.KiWiResource;
import kiwi.core.model.rdf.KiWiUriResource;
import kiwi.core.model.user.KiWiUser;
import org.slf4j.Logger;

import javax.enterprise.inject.Any;
import javax.enterprise.inject.Instance;
import javax.inject.Inject;
import java.io.InputStream;
import java.io.Reader;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 * User: Thomas Kurz
 * Date: 02.02.11
 * Time: 11:38
 */
public class ImportServiceImpl implements ImportService{

	@Inject
    private Logger log;

    private Map<String,Importer> importerMap;



	@Inject
	public void initImporters(@Any Instance<Importer> importers) {
        if(importerMap == null) {
            importerMap = new HashMap<String,Importer>();
            for( Importer i : importers ) {
                for( String s : i.getAcceptTypes() ) {
                    importerMap.put(s,i);
                    log.info("registered importer for type {}: {}",s,i.getName());
                }
            }
        }
	}


	@Override
	public Set<String> getAcceptTypes() {
		return importerMap.keySet();
	}

	@Override
	public int importData(URL url, String format, Set<KiWiUriResource> types, Set<KiWiResource> tags, KiWiUser user) throws KiWiImportException {
		return getImporterInstance(format).importData(url,format,types,tags,user);
	}

	@Override
	public int importData(InputStream is, String format, Set<KiWiUriResource> types, Set<KiWiResource> tags, KiWiUser user) throws KiWiImportException {
		return getImporterInstance(format).importData(is,format,types,tags,user);
	}

	@Override
	public int importData(Reader reader, String format, Set<KiWiUriResource> types, Set<KiWiResource> tags, KiWiUser user) throws KiWiImportException {
		return getImporterInstance(format).importData(reader,format,types,tags,user);
	}

	private Importer getImporterInstance(String type) throws KiWiImportException {
		if(!importerMap.containsKey(type)) throw new KiWiImportException("no importer defined for type "+type);
		return importerMap.get(type);
	}
}